Mechanical stoker.



C. l. PILLIOD.

MECHANICAL STOKER.

` APPLlCATlON FLEDSEPLS. 1914- 1 1 98, 1 4:8 Patented Sept. 12, 1916.

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UWE/WOR C.J.P1LL1OD.

AMECHANICAL STOKER.

APPLICATION FILED SEPT. a` 1914.

Patented Sept. 12, 1916.

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VVENTOH Charles rf; Pzm

BY. mmm/mm C. I. PILLIOD.

MECHANICAL STOKER.

APP'LlcATIoN man SEPT. s, |914.

Patented sept. 12,1916.

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CHARLES J. .PILLIOD,fOF TOLEDO, OHIO. v

v v MECHANICAL STOKER.

Specification of Letters Patent.

' Patented sept. 12,1916.

Application led September 8, 1914.` Serial No. 860,694.

To all whom t may concern Be it knownfthat I, CHARLns J .-PrLL1oD, a

citizen of the'United Svtatesof America, re-

struction in which `the fuel is fed into the furnace centrally thereofand is distributed by a blast overv the fuel bed and to the. sides lofthe furnace chamber:

It is one of the .objects ofthe inventionl to obtain a uniformdistribution of the fuel .so as to produce thehighest eliciency'inyheatgeneration, and a further object is to obtain a constructionV which willoperate equally well witha slow or a fast fire.

With these objects vin View, the invention comprises the construction ashereinafter set forth. Y

In the drawings: Figure 1 is a plan view;

. Fig. la is a longitudinal section through the fuel trough and' fuellfeed motor; Fig. 2 is a cross section thereof; Fig. 3 is a'sectionthrough the valve-operating lmotor; Fig. 4

is a cross section on line H Fig.,3; and

Fig. 5 is a side elevation of the cam wheels.

A is the combustion chamber of' a furnace, such as that for alocomotiveboiler.

B is a trough-shaped casing arrangedcentrally and extendinglongitudinally of the furnace chamber, below the grate llevel thereof.

C isa hopper arranged outside of the furnace and communicating with thecasing B. D is a reciprocatory fuel-pusher for propelling the fuel fromthe hopper C into .the

furnace chamber, and E is a Riston motor for operating the fuel pusher.

Distributed along the casing B near the upper edge thereof are ports ortwyers F, which are connected with channels G formed in the casing andextending out from the furnacechamber. These channels are connected bypipes Gr with a source of blast, preferably steam from the boiler,which, however, is controlled by valves automatically operated -by atimed mechanism. The piston motor E which operates `the fuelpusher isalso controlled by automatically` operated valves, .and I preferablyemploya common fmechanism for operating .all of driv'e train actuated byIa rock-arm K for actuating a -rocker valve K. This vvalve controls theadmission of steam to the piston motor E which operates thereciprocatory pusher, and consequently the speed of operation of saidpusher is governed by the speed of operationof the motor I. The steampipes leading to the piston motor E from the' casingl-I and controlledby said valveK are designated by. the nu- A in the form of a worm meralK2. Operated by'this sainevmotor I is a transmission and governingmechanism which' controls the valves vvfor admitting the blast to the`twyers F. This ,mechanism as4 specifically shown comprisesv a shaft Lwhich is driven from the crank shaft of the motor I through the mediumof a sprocket andA chain drive connection- L.

M M' M2, etc., are a-series of worm shafts extending transversely to theshaft L "and driven from the latter of beveled gears L?.

N is a shaft parallelv tothe shaft L and N is a tubular shafttelescopically engaging the same.

O is a worm wheel keyed upon the tubular shaft N and meshin with theworm M, so as to be driven there y' and to. transmit rotary movementto'said shaft.'

O` is a worm wheel intermeshing with the Worm M and mounted upon asleeve O2 rotatively engaging .the shaft'N.

through the medium P P and P2. are disk-shaped cams ary ranged adjacentto'each other, the cam P being secured tothe sleeve 0?,.the cam P to thetubular shaft N', and the` cam P2 to a sleeve P3 whichhas a spiral slotP* en- -gaging a pin P5 extending transversely pin in the latter slot.will eect a rotatiy/t I Slmll 51.0.55 P6 and P", and a roller P1 10utheft thereby rotacrank armQj engaging'a .collar N* on the lifting theroller R3 adjustment of said cams, which -in turn is all other positionsof P and' P2 aire ineffective'.

shaft N to move said shaft longitudinally.

The camsP P and P2 together .constitute a v compound vcamwhich actuatesa rod R A connected to av rocker' arm upon the sten. of a rocker valveR2 for controlling the blast to'one of the twyers F. The rod R' has atits 'lowerend a roller Ra which engages the periphery of the compoundcam and it-moved inward and outward'by the fashioned contour thereofTh'ecam P is driventhrough thefworin lgearing O and M' at a relativelyAslow rate, and once in each revolution registers a depressed por-A`tion inv itsperipherywith. the roller R3. The cams P and P2 are drivenat a higher `rate of speed andoperate respectively as timing camsrespectively for dropping and when `in registration With the depressionin the cam' P, butin Y said cam P the cams Furthermore7 thetir'ning ofthese-earns tothe-interval between v'the droppingo'fth'e roller" and theraising ofA thegsarneis. dependent upon the relative dependent upon theAgovernor and. the speed at which it is rotated. Thus avariation inspeed will' cause the governor to either 'move the shaft N outward inthetubular shaft N" or permita spring Ns to move said lshaf-t'in theQpposite direction. AEach of these movements 'will through the medium ofthe pin P5 45,

relation 'of the cams PA' andv P2.

engaging'the spiral vslot P* in the sleeve'P3 cause a rotative ad-`justment of said sleeve,'v which varies the i The purvose of the wholeconstruction is to adjust he cam-Whenever there visf-aschange inv speedi the motor. shaft, so thattheinterval in ich the valve controlling vthetwyer is en remains substantially constant regard s :ofvariations inspeed ofthe motor. n the otherhand, any variation in the peed of themotor will cause a variation in V"th'fl operation of the fuel pusheractuated {tli reby, either increasing'or decreasing the antity of fuelfed into the trough B."

The\ supply'of steam (orequivalent fluid) vto the is through a pipe G3enteringthe The relao-f 'the piston motor E to the casing H 2"ell-'shownin Fig. 4.

` E?" will be understood that there is a duplies categ, mechanism,Acomprising a compound the slowing ofthe motor to I produce the same 'vscribed in operation, the fuel whichis deposited inthe hopper Cwillbeperiodically fed in measured the best results are obtained quantitiesAby the reciprocatory pusher Dractuated by the piston motor S Opentheblast ad-ff stant rate; but the operation'of-the pusher A that wheresaid motor is accelerated the timeinterval between successive'.periods-of operation of the pusher a-re. increasedfwhile the length ofinterval between 'periods `of operation. Jdy means of this-arrangement;the operator is enabled to increase*I or dimin;

ish the quantity'of fuel fed into 'thejfur nace by varying the'speedofthe motor .L V 'which is controlledby an adjustable throt-` tle valve,butthis alterationin the quantity of fuel fed does not'intervfere withthe uni- 'formity vof the' distribution of the fuel over operation. Toproduce the best results in the operafuel distributed to differentpartsof the furnace chamber should be exactly proportion ate, and thisnecessitates aplurality of the twyers F distributed along the trough B,

and also an adjustment/of the strength of i blast passing through eachtwyer to'effect the`desired operation upo'nthe fuell.v I have thereforeprovided -a separate valve R2 for each of the twyers-F, and have further-provided a separate throttlevalve- S operating in conjunction Ywith thevalve R2 and vpermitting of varying the strength of..blas`t of thedifferent twyers. As shown the valve S is arranged above thecorresponding valve" R?, while the 'latter controls the opening into achamber T which is connected by'a suitable conduit with thekorresponding will vary Vwith the speedjof the moto- I. so i I Willdecrease the furnace `bed --When' the tvvyers are Vin 105 tion of thefurnace it is required that .the

ing it to the sides and consequently the improved results are obtained.

What I claim as my invention isz l. In a stoker, the combination withmeans for variably feeding the fuel into the furnace chamber, of meansfor distributing said fuel at a uniform rate over the furnace bed,

tially constant during variations in the rate of feeding.

2. In a stoker, the combination of means for feeding measured quantitiesof fuel into the furnace chamber at varying intervals, and means fordistributing said measured quantities of fuel at a constant rate overthe fuel bed, the rate of distribution remaining substantially constantduring variations in the rate of feeding.

3. In a stoker, the combination with mechanical means for periodicallyfeeding fuel into the furnace chamber, of pneumatic means fordistributingy the fuel over the furnace bed, timed mechanism controllingthe sequential operation of said mechanical feeding and pneumaticdistributing means, and means for varying the speed of operation of saidmechanical feeder without changing the rate of distribution of saidpneumatic means.

4. In a stoker, the combination with means for feeding a measuredquantity of fuel into the furnace chamber centrally thereof, mechanicalmeans for distributing the fuel to the center portion 'of the furnacebed, and pneumatic means for distributing said fuel over the furnace bedand to the eXtreme sides thereof.

5. In a stoker, the combination of mechanical means for feeding measuredquantities of fuel into the furnace chamber, a motor for operating saidfeeding means, means for varying the speed of said motor, pneumaticmeans for distributing the fuel fed into the furnace, a valvecontrolling said pneumatic means periodically operated by said motor,and means for maintaining the period of opening of said valve constantindependent of variations in the speed of the motor. 1

6. In a stoker, the combination of mechanical means for feeding measuredquantities of fuel into the furnace, pneumatic means for distributingthe fuel in the furnace chamber, a continuously operating ,motor forperiodically operating said mechanical feeding means and ,alsoperiodically opening and closing said pneumatic distributing means,means for varying the speed of said motor, and means for maintaining theperiod ofvopening of said pneumatic means constant during'variations inspeed of said motor.

7. In a stoker, th'e combination with means for feeding measuredquantities of fuel into the furnace chamber, of a blast twyer fordistributing the fuel fed into said chamber, a valve for opening andclosing said blast twyer, a continuously operating motor forperiodically operating said fuel feeding means and for also opening andclosing said valve after each periodic feeding, means for varying thespeed of said motor to vary the intervals between successive feedingoperations, and means for automatically maintaining the interval ofopening of said valve substantially constant independent of variationsin speed of the motor.

8. In a stoker, the combination with the furnace chamber, of a fuelreceiving trough extending longitudinally of said chamber and providedwith a blast twyer, means for periodically feeding fuel into saidtrough, and means for automatically opening said blast tvvycr todistribute the fuel received by said trough.

9. In a stoker, the combination with the furnace chamber, of a fueltrough extending longitudinally thereof,

means for periodically feeding measured` quantities of fuel into saidtrough, and coreceiving .i

acting means for pneuniatically distributing ltohc fuel from said troughover the furnace ed.

10. In a stoker, the combination with a furnace chamber', of a fuelreceiving trough having a plurality of blast twyers distributed alongthe length thereof, means for periodically feeding measured quantitiesof fuel into said trough, co-acting means for periodically opening andclosing said twyers to pneumatically distribute the fuel over thefurnace bed, and means for independently controlling said twyers to varythe distribution effected thereby.

11. In a stoker, Vthe combination with a furnace chamber, of a troughextending longitudinally thereof, a fuel hopper, a reciprocatory pusherfor feeding measured quantities of fuel from said hopper into saidtrough, a pneumatic motor for operating said pusher, a blast twyer fordistributing the fuel from said hopper over the furnace bed, a valvecontrolling said twyer, a continuously operating motor, connectingmechanism for operating from said `anotor the valve controllingsaid'feeder motor and twyer, means for varying the speed of saidcontinuously operating motor, and a governor for, maintaining the periodof opening of said blast twyer substantially constant independent ofvariations `in the speed of said motor.

12. In a stoker, the combination withy and mechanism respectivelyassoiated with the valves for maintainingr their period of Openingconstant during variations in Speed nf the actuatinfvj means.

lil. ln a Stoker, the combination with means fur tending fuel into afurnace Chaniber, of :i motor 'for avtuaing saiil means. pneumatic meansfor diiriliutiug the fuel within the furnace. a Secund inotnr perioirl-Y @inning uml Closing' 'aid n 4Etrilniirig iii-vans, ineen# UttaliliMantiallg :alias-tant epm-li ratif, 1er-tuer inn motor. r lnrl inernrl"for niaintaini 5 Jiu "ni'iml liner lie pneuu means eubstant' alla' Com`Y' iin-ne' in lpewi i ie mntfnzi.

in :v: Stnli' lie Coilrlination with tlw 1, wlmnilwr nt atiiilie(-,ei\'iiij trou i f perimlimilly forcing lie troni and nieamltop portion 0f the ruulgh tu diSplar-Q laterally to eaqli sim? nt" thetrniv'i l5t In :i Stoker, ine cmn Vmn means tsr feeding: znnaturml fluaniti fuel into the furnaw, if a ating Said nwans. ti'inuting`pint-Q2; 'natur pneumatic nenne t YRiYf- Cm i applicni'wn fluir` if? YHalve 70 f pneuniar #warf/'fling

